Originally Posted by
findark
Based on historical fares, I agree - the ticket is almost certainly refundable minus penalty, and full marks for creativity in using the change fee waiver to refund the residual
Are you sure the OP would get the residual as a refund? In my experience, the remaining unused amount goes onto a travel credit.
I currently have three residual credits for $0.40 - $12.82 attached my M+ account for small changes I have made to my flights in the last year.